The top after-market NYSE gainers on Thursday are: Dresser-Rand Group, Kraton Performance Polymers, Beazer Homes, LDK Solar Co, Empire District Electric, Toronto Dominion Bank, Transcananda Corp, Bank Of Montreal, CACI International and Yingli Green Energy Holding.

Dresser-Rand Group Inc. (NYSE:DRC) shares advanced 3.63 percent to $50.80 in aftermarket trading session. The company will replace AMB Property in the S&P MidCap 400 after the close of trading on Thursday, June 2.

Kraton Performance Polymers, Inc. (NYSE:KRA) shares advanced 3.51 percent to $37.72 I post market trading session. The company will replace Whitney Holding Corp. (NASD: WTNY) in the S&P SmallCap 600 index, all after the close of trading on Friday, June 3.

Beazer Homes USA, Inc. (NYSE:BZH) shares gained 2.64 percent to $3.89 in post market trading session. The stock has a 52 week low of $3.10 and 52 week high of $6.23 and has $288.75 million market capitalization.

LDK Solar Co. Ltd. (NYSE:LDK) shares advanced 2.42 percent to $6.77 in post market trading session. The company announced that it has signed a module supply contract with a Italy-based solar systems integrator. Under the terms of the agreement, LDK Solar will provide 45 megawatts (MW) of solar modules with monthly shipping expected to commence in June 2011.

Empire District Electric Co. (NYSE:EDE) shares advanced 2.2 percent to $19.45 in post market trading session. The company stock plunged more than 45 percent in regular trading session.

Toronto Dominion Bank (NYSE:TD) shares advanced 2.15 percent to $87.62 in post market trading session.

Transcananda Corp. (NYSE:TRP) shares gained 2.11 percent to $44.69 in aftermarket trading session.

Bank Of Montreal (NYSE:BMO) shares gained 2.11 percent to $64.35 in post market trading session.

CACI International, Inc. (NYSE:CACI) shares advanced 2 percent to $62.61 in post market trading session.

Yingli Green Energy Holding Co Ltd. (NYSE:YGE) shares advanced 1.73 percent to $8.81 in aftermarket trading session. The stock has a 52 week low of $8.20 and 52 week high of $14.29 and has $1.29 billion market capitalization.

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